| Tournament details | |
|---|---|
| Dates | May 6 – May 30, 2031 |
| Teams | 10 |
| Defending champions | Miami United |
| Final positions | |
| Champions | SC Atlanta |
| Runner-up | CF Tijuana |
| Third place | CF Ciudad de México |
The 2031 NAL Playoffs, retroactively referred to as the 2031 UL Playoffs, was the postseason tournament of the North American League's (NAL), now named the United League's (UL), 2030–31 season. The playoffs began on May 9 and concluded on May 30 with SC Atlanta winning their first Final.
The tournament is best known for its extremely unusual structure. Prior to the start of the 2030–31 NAL season, the league had changed its playoff format from a eight-team single-elimination tournament to a ten-team single-elimination tournament with reseeding after every round except the semifinals and Final; in addition to the reseeding, the top two teams would get a bye to the second round. Three weeks after the tournament concluded, the NAL reinstated its old ten-team play-in tournament as the official playoff format.
Bracket
edit| 3) Miami United | 0 | Reseeding | Reseeding | Reseeding | ||||||
| 10) Ciudad de México | 1 | |||||||||
| 1) Sporting TC | 0 | |||||||||
| 6) SC Atlanta | 1 | 10) Ciudad de México | 2 | |||||||
| 7) Dallas United | 0 | |||||||||
| 4) Boston Minutemen SC | 1 | 6) SC Atlanta | 3(8) | 5) CF Tijuana | 0 | |||||
| 5) CF Tijuana | 2 | 10) Ciudad de México | 3(7) | 6) SC Atlanta | 3 | |||||
| 4) Boston Minutemen SC | 1 | Bye: CF Tijuana | ||||||||
| 9) CF Havana | 0 | 2) Sporting Ottawa | 0 | |||||||
| 6) SC Atlanta | 1 | |||||||||
| 5) CF Tijuana | 1 | |||||||||
| 8) CF Cancún | 0 | |||||||||